fix(payment): portal checkout dialogs to viewport

(cherry picked from commit 67f292353e)
2026-07-27 18:50:39 +08:00
parent d01441b8c7
commit 9f829bbc0e
10 changed files with 502 additions and 137 deletions
@@ -0,0 +1,119 @@
+import { expect, test, type Page } from "@playwright/test";
+
+import { stripePaymentDialogStyles } from "@/app/_components/payment/stripe-payment-dialog.styles";
+import { mockCoreApis } from "@e2e/fixtures/api-mocks";
+
+const viewports = [
+  { width: 390, height: 844 },
+  { width: 405, height: 797 },
+  { width: 540, height: 900 },
+] as const;
+
+test.beforeEach(async ({ page }) => {
+  await mockCoreApis(page);
+});
+
+for (const viewport of viewports) {
+  test(`payment portal stays viewport-bound at ${viewport.width}x${viewport.height}`, async ({
+    page,
+  }) => {
+    await page.setViewportSize(viewport);
+    await page.goto("/subscription?type=topup", {
+      waitUntil: "domcontentloaded",
+    });
+
+    await mountPaymentPanel(page, 180);
+    await expectViewportScrim(page, viewport);
+    await expectCenteredShortPanel(page, viewport);
+
+    await mountPaymentPanel(page, 1_200);
+    await expectViewportScrim(page, viewport);
+    await expectScrollableTallPanel(page, viewport);
+  });
+}
+
+async function mountPaymentPanel(page: Page, contentHeight: number) {
+  await page.evaluate(
+    ({ dialogClassName, overlayClassName, requestedContentHeight }) => {
+      document.querySelector('[data-testid="payment-layout-overlay"]')?.remove();
+      document.querySelector('[data-testid="transformed-checkout-host"]')?.remove();
+
+      const transformedCheckoutHost = document.createElement("div");
+      transformedCheckoutHost.dataset.testid = "transformed-checkout-host";
+      transformedCheckoutHost.style.transform = "translateX(50%)";
+      document.body.appendChild(transformedCheckoutHost);
+
+      const overlay = document.createElement("div");
+      overlay.dataset.testid = "payment-layout-overlay";
+      overlay.className = overlayClassName;
+
+      const panel = document.createElement("div");
+      panel.dataset.testid = "payment-layout-panel";
+      panel.className = dialogClassName;
+
+      const content = document.createElement("div");
+      content.style.height = `${requestedContentHeight}px`;
+      content.textContent = "Complete payment";
+      panel.appendChild(content);
+      overlay.appendChild(panel);
+
+      // Mirrors ModalPortal: the overlay must be a body child, never a child of
+      // the transformed checkout host that triggered it.
+      document.body.appendChild(overlay);
+    },
+    {
+      dialogClassName: stripePaymentDialogStyles.dialog,
+      overlayClassName: stripePaymentDialogStyles.overlay,
+      requestedContentHeight: contentHeight,
+    },
+  );
+}
+
+async function expectViewportScrim(
+  page: Page,
+  viewport: { width: number; height: number },
+) {
+  const overlay = page.getByTestId("payment-layout-overlay");
+  await expect(overlay).toBeVisible();
+  const box = await overlay.boundingBox();
+
+  expect(box).not.toBeNull();
+  expect(box?.x).toBeCloseTo(0, 0);
+  expect(box?.y).toBeCloseTo(0, 0);
+  expect(box?.width).toBeCloseTo(viewport.width, 0);
+  expect(box?.height).toBeCloseTo(viewport.height, 0);
+  await expect(overlay.evaluate((node) => node.parentElement === document.body))
+    .resolves.toBe(true);
+}
+
+async function expectCenteredShortPanel(
+  page: Page,
+  viewport: { width: number; height: number },
+) {
+  const panel = page.getByTestId("payment-layout-panel");
+  const box = await panel.boundingBox();
+
+  expect(box).not.toBeNull();
+  expect(box?.y ?? 0).toBeGreaterThan(100);
+  expect(Math.abs((box?.y ?? 0) * 2 + (box?.height ?? 0) - viewport.height))
+    .toBeLessThanOrEqual(2);
+}
+
+async function expectScrollableTallPanel(
+  page: Page,
+  viewport: { width: number; height: number },
+) {
+  const panel = page.getByTestId("payment-layout-panel");
+  const box = await panel.boundingBox();
+  const scrollMetrics = await panel.evaluate((node) => ({
+    clientHeight: node.clientHeight,
+    scrollHeight: node.scrollHeight,
+  }));
+
+  expect(box).not.toBeNull();
+  expect(box?.y ?? 0).toBeGreaterThanOrEqual(15);
+  expect(box?.y ?? 100).toBeLessThanOrEqual(25);
+  expect((box?.y ?? 0) + (box?.height ?? 0))
+    .toBeLessThanOrEqual(viewport.height - 15);
+  expect(scrollMetrics.scrollHeight).toBeGreaterThan(scrollMetrics.clientHeight);
+}